REST API Design
Service Overview
I design clean, scalable, and well-documented REST APIs that serve as the backbone of modern web applications. From endpoint architecture and resource modelling to versioning strategies and OpenAPI documentation — every API I deliver is built for long-term maintainability, developer experience, and production reliability.
Services Offered
API Architecture & Endpoint Design
Structured RESTful endpoint design following industry best practices — proper HTTP methods, resource naming conventions, status codes, and request/response schemas. Built for clarity and consistency from day one.
OpenAPI / Swagger Documentation
Complete API documentation with OpenAPI 3.0 / Swagger — interactive docs, request/response examples, error schemas, and authentication flows. Every endpoint documented so your team or clients can integrate with confidence.
Versioning & Backward Compatibility
API versioning strategies (URI, header-based) that allow your platform to evolve without breaking existing integrations. Deprecation policies and migration paths planned upfront.
Authentication & Rate Limiting
JWT Bearer token authentication, API key management, OAuth 2.0 flows, and rate limiting strategies. Secure by design — protecting your API from abuse and unauthorized access.
Testing & Validation
End-to-end API testing with Postman collections, Jest + Supertest integration tests, and input validation schemas. Every endpoint verified against edge cases, error states, and performance benchmarks before delivery.
Technologies Used
Development Process
Requirements & Contract Definition
I work with you to map out every resource, action, and data flow your API needs to support. The result is a complete API contract — endpoint list, request/response schemas, error codes — agreed before a single line of code is written.
API Design & Documentation First
I write the OpenAPI specification before implementation — a "design-first" approach that catches structural issues early, enables parallel frontend/backend development, and ensures the final API matches what was agreed.
Implementation
API built with Node.js/Express or C# ASP.NET Core following the agreed spec. Input validation, error handling, authentication middleware, and logging all implemented consistently across every endpoint.
Testing & Review
Full Postman collection delivered alongside integration tests covering happy paths, edge cases, and error scenarios. API reviewed against the original contract — every deviation documented and resolved.
Deployment & Handover
API deployed with Docker, CI/CD pipeline configured, and live Swagger documentation published. Full handover includes source code, Postman collection, OpenAPI spec, and environment configuration guide.